Fig. 2
From: PM2.5 constituent exposures and maternal circulatory homocysteine in early pregnancy
Associations of average PM2.5 and constituent exposures during the post-conception period with the LnHcy in generalized additive models in EPL (n = 162) and NEP (n = 162) groups. Note: The independent variables included average concentration of PM2.5 or each constituent, Ln5-MeTHF, all demographic characteristics presented in Table 1, temperature, and relative humidity. The pentagrams, dots, rhombuses, squares, and triangles represented the estimated LnHcy associated with the 10th, 25th, 50th, 75th, and 90th percentiles of pollutant concentrations, respectively